.box {
    width: 600px;
    height: 600px;
    margin: 30px auto;
    border: 1px solid #000;
    padding: 60px;
    box-sizing: border-box;
}

.top h3 {
    font-weight: 400;
    font-size: 24px;
}

.top p {
    font-size: 18px;
    color: #ccc;
}

.top span {
    color: red;
}

.top input {
    display: block;
    width: 500px;
    border: none;
    border-bottom: 1px solid #000;
    line-height: 20px;
    outline: none;
}

.box .center {
    display: flex;
    justify-content: space-between;
    font-size: 18px;
}

.box .center a {
    text-decoration: none;
    color: #000;
}

.box .center a:hover {
    text-decoration: red;
    color: #ccc;
}

.bottom {
    display: flex;
    justify-content: space-between;
    margin-top: 40px;
}

.bottom .button {
    display: block;
    width: 220px;
    height: 40px;
    border-radius: 15px;
    background-color: #000;
    color: #fff;
    border: none;
}

.bottom .button:hover {
    background-color: #fff;
    color: #000;
    border: 1px solid #000;
    transition-property: background-color, border;
    transition-duration: .5s;
}

.conten {
    text-align: center;
}

.add {
    display: flex;
    justify-content: space-between;
}

.tip1,
.tip2 {
    display: none;
    color: #000;
}